Slayer with initate / proslyte armor (don't worry about the def bonus, you get used to it), plus ultimate strength on (or just superhuman).
P pots.
Amazing way to make money while getting a lot of XP via the slayer helm and prayer boosts.
It sounds silly but I was poor when I was about your str lvl.. now I'm 14.5m xp in and I have 157m.
Of course nowadays I usually just train on abby demons and spirit mages with my 84 slayer, so I rack in some loose change while at it.
regarding Armored zombies, they're great XP if there arent any fags there, but otherwise you might have a bit of trouble finding a world. Haunted Mine isn't that hard- it's just long.
but note that to get the enhanced version of the amulet, you have to beat that mini-game after the quest too.
Or else, just train on green dragons in a bounty world at 35 wild. No one really goes there- average death rate is about once in 2 - 3 hours. Wear some d'hide, a d scim, and then risk to add up to about 75k. This way, you gain EP and make lots of cash too!
If you hate banking so much, go to the Red Spiders in world 26 by the KBD lair (38 wild down ladder) with a tele, and antifire shelid in inventory. Bring your best training gear. People RARELY come, and if they do, pull the lever with your shelid on and see if they're idiotic enough to follow you in. If they do, free loot. Mage pray does NOT work- you MUST have an anti shelid against the dragon, so they won't last long. If all fails, just tele out of the lair. This is a great EP method too.